SFHA-VVR - 2 Linux node cluster with VVR enabled, unable to switch DR site to primary site

Hi

I need the help

we have 2 node cluster (Linux 5.9) with VVR has configured, before few days back, we switch the Primary site node to DR site Node, yesterday, we planned to switch the DR site node to Primary site, its is not properly switching to primary site node and also replication is not moving from DR site to Primary site.